Silo.



'UNITED ,STATES PATENT OFFICE.

Asn/ nvr WALRATH AND EDWARD L. maven, or WEEDsPoRT,-NEw Yorin, SMD TRVEBAssIGNoR To SAID WALRATH.I

SILO.

Specioezion ofiLetters Patent.'

Patented July 2, 1907.

'Application filed April 3,1906. Serial Nu. 309,652.

To all whom 'it may concern:

Be it known that we, ABRAM WALRATH and EDWARD LrTnavnn, citizens of theUnited States, and residents of Wcedsport, in the county of Cayuga, inthe State of New York, have invented new and useful Improvements inSilos, o which the following, taken in connection with the accompanyingdrawings, is a iull, clear, and exact description.

This invention relates to the class of silos which are composed ofvertical staves bound by hoops and provided with a vertically extendeddoorway.

The object o the presentv inventiofn is to provide simple, inerrpensiveand efficient means or removably securing the doors in the doorway. Anda further o'bject ol' the invention is to provide a simple, convenientand reliable brace or maintaining the doorposts straight and parallelAAnd to that end the invention consists in the improved construction andcombination ol parts hereinafter described and claimed.

ln the accompanying drawings Figure l is an elevation'oi a siloembodying our improvements. Fig. 2 is an enlarged horizontal transversesection o one o the doors and adjacent portions of the silo'. Fig. 3v..is a Inrther enlarged vertical transverse section on the line 3 3 inFig. 2: Fig, 4 is a detached perspective view oi one of the silo-doors:and Fig. 5 is an enlarged detaohed plan view of one of the spreader-barsof the silo.

Similar letters of reference indicate corresponding parts.

A- denotes the body of the silo which is formed from vertical strives -aa-fbound together by means of hoops -b b emhincing the said body in theusual manner. The body -AM is provided with a vertically extendeddoorway and with doorposts, c c, at opposite sides of the doorway. Saiddoor-posts nre-provided or lornied with beveled inwardly lacing jainbs-dto which are fitted the vertical edges ol the doors lFor securing thedoors in the doorway we employ on one o the vertical edges ol each dooran outwardly projecting hook -c-, which has its end portions extendingapproximately at right angles in opposite directions from the centralportion Iand is rigidly attached at one ol said end portions to theexterior ol the door -D and in such n. position as to cause'the centralportion ol' said hook to extend directly across the door-post -cd inclose proximity thereto while the outer end portion ol1 said hookengages the outer lace o the door-post ns clearly shown in Fig. 2 ol thedrawings. The. said hook is capable of preventing the door fromdroppiilg out ol' the doorway, during the operation ol' sluiting thedoor vertically in its position as hereinaiter explained.

Near the opposite vertical edge of the door, we employ a suitable clamp-G- for engaging 'the door-post -cthereat.

We do not limit ourselves to the specific forni of clamp shown in thedrawings, inasmuch as the salire or `similar effect may be produced bydifferent styles of clamps. The clamp herein shown is pivoted on the.

outer end of a bolt -fwhich passes through'a post gfastened to the door.The engaging part of said' -clanrp is beveled-and bears on the exteriorof the doorvpost -'-c-, which is preferably provdedwith a metal strip-hon Awhich the engaging clamp bears.. By turning the clamp o theuppermost door -D-suilficiently to loosen the door thereat on the jamb-dwithout allpwing the clamp to completely lose its hold on thedoor-post, the said door can be pushed up and reclanxped in its elevatedposition to form an opening beneath it for removing therethroughensilage from the silo when required. Each succeeding lower door can beremoved as aforesaid,- according to the height of the remainingensilage. I l

.We place thedoor-posts flush with the exterior of the silo to allow thehoops -b-bto bear on the outer faces of the door-posts and continuedirectly across the doorway and at the Sametime maintain the hoops inproper Contact with the staves adjacent to the doorposts as shown inFig. 2 o the drawings.

Our described door-fastening devices are espe cially well adapted for adoor which is composed of a tier o transversely disposed stave-sections#jj-9 tiked together' by means or' dowels -c-l'- passing ver ticallythrough said stavo-sections as shown in Figsf'? and 4 of the drawings.0n a door of this construction, the hook -cand clamp C are attached toopposite ends of one o1' the stave-sections -jwhich possesses therequisite stability to prevent its ilexure.

'.lo maintain the two door-posts straight und parallel, we employspreader-bars -l-lwhich extend across the doorway and are placed near tothe outer faces of the doors and in line with the direction oi thepressure exerted on the door-posts by thc .st-aves aci when the hoopsare tightened on the` silo. We forni each of the sprenderfbars A-lof n.straight stout iron or steel rod, the ends ol which are formed withright and leit wood-screws -n -1lwhich are tapered or ginilotpointed, asshown in Fig. 5 o the drawings. Tho

threads oi said screws nre coarse and deep to obtain a secure hold inthe wood of the door-posts throughout The aforesaid improved elleets'tromore particularly obtained fromthe arrangement of the spreader-barsbeing in lines Within the thicknessof the stoves adjacent to thedoor-posts. Aside from these-improved effects 'we save the time andlabor of boring completely through the door-posts and also the expenseof nust usually'appiied to spreader bars employed for that purpose.

posts disposed fish with the exterior of the silo and formed withinwardly beveled jumps, doors seated removobly on said jamlis hookshaving their end portions extendingy approximately at right anges inopposite directions from the central portions and rigidly attached atoueend portion to the door'zmd having; the outer end pol'- tons hearingon the outer face or' tho adjacent doot-post, clamps 'on the doorsengaging the opposite door post, straight sprenderehars formed withright and left threaded wood screws screwed into the doot-posts inlinesy within the thirkn s of the stares, and hoops bearing on the outerfar. of the door posts and continued across the doorway substantially asset forth and shown.

K ABitAM \VALI{A'1I:I.

EDWARD L. 'DRAVEIL lL. SJ lL. SJ

Witnesses H. BIDwnLL,

FRANK L. Dn'rsm..

